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| author | Rob Landley <rob@landley.net> | 2005-08-20 05:07:08 +0000 |
|---|---|---|
| committer | Rob Landley <rob@landley.net> | 2005-08-20 05:07:08 +0000 |
| commit | d00b3a5e944e7499bd061c0b8f9d9f0847528fce (patch) | |
| tree | 2bec1c6e32716bf8bc204ed411e6287ee728e3f9 /miscutils/mountpoint.c | |
| parent | fc3f048f8f6de2132c83bbd1124dabd0990a952b (diff) | |
| download | busybox-w32-d00b3a5e944e7499bd061c0b8f9d9f0847528fce.tar.gz busybox-w32-d00b3a5e944e7499bd061c0b8f9d9f0847528fce.tar.bz2 busybox-w32-d00b3a5e944e7499bd061c0b8f9d9f0847528fce.zip | |
Bernhard Fischer provided a mountpoint(1) applet. This is apparently something
sysvinit provides, and which is used by the debian init scripts.
Diffstat (limited to 'miscutils/mountpoint.c')
| -rw-r--r-- | miscutils/mountpoint.c | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/miscutils/mountpoint.c b/miscutils/mountpoint.c new file mode 100644 index 000000000..46b2d4e26 --- /dev/null +++ b/miscutils/mountpoint.c | |||
| @@ -0,0 +1,70 @@ | |||
| 1 | /* vi: set sw=4 ts=4: */ | ||
| 2 | /* | ||
| 3 | * mountpoint implementation for busybox | ||
| 4 | * | ||
| 5 | * Copyright (C) 2005 Bernhard Fischer | ||
| 6 | * | ||
| 7 | * Licensed under the GPL v2, see the file LICENSE in this tarball. | ||
| 8 | * | ||
| 9 | * Based on sysvinit's mountpoint | ||
| 10 | */ | ||
| 11 | |||
| 12 | #include <sys/stat.h> | ||
| 13 | #include <errno.h> /* errno */ | ||
| 14 | #include <string.h> /* strerror */ | ||
| 15 | #include <getopt.h> /* optind */ | ||
| 16 | #include "busybox.h" | ||
| 17 | |||
| 18 | int mountpoint_main(int argc, char **argv) | ||
| 19 | { | ||
| 20 | int opt = bb_getopt_ulflags(argc, argv, "qdx"); | ||
| 21 | #define OPT_q (1) | ||
| 22 | #define OPT_d (2) | ||
| 23 | #define OPT_x (4) | ||
| 24 | |||
| 25 | if (optind != argc - 1) | ||
| 26 | bb_show_usage(); | ||
| 27 | { | ||
| 28 | char *arg = argv[optind]; | ||
| 29 | struct stat st; | ||
| 30 | |||
| 31 | if ( (opt & OPT_x && stat(arg, &st) == 0) || (lstat(arg, &st) == 0) ) { | ||
| 32 | if (opt & OPT_x) { | ||
| 33 | if (S_ISBLK(st.st_mode)) | ||
| 34 | { | ||
| 35 | bb_printf("%u:%u\n", major(st.st_rdev), | ||
| 36 | minor(st.st_rdev)); | ||
| 37 | return EXIT_SUCCESS; | ||
| 38 | } else { | ||
| 39 | if (opt & OPT_q) | ||
| 40 | putchar('\n'); | ||
| 41 | else | ||
| 42 | bb_error_msg("%s: not a block device", arg); | ||
| 43 | } | ||
| 44 | return EXIT_FAILURE; | ||
| 45 | } else | ||
| 46 | if (S_ISDIR(st.st_mode)) { | ||
| 47 | dev_t st_dev = st.st_dev; | ||
| 48 | ino_t st_ino = st.st_ino; | ||
| 49 | char *p; | ||
| 50 | bb_xasprintf(&p, "%s/..", arg); | ||
| 51 | if (stat(p, &st) == 0) { | ||
| 52 | short ret = (st_dev != st.st_dev) || | ||
| 53 | (st_dev == st.st_dev && st_ino == st.st_ino); | ||
| 54 | if (opt & OPT_d) | ||
| 55 | bb_printf("%u:%u\n", major(st_dev), minor(st_dev)); | ||
| 56 | else if (!(opt & OPT_q)) | ||
| 57 | bb_printf("%s is %sa mountpoint\n", arg, ret?"":"not "); | ||
| 58 | return !ret; | ||
| 59 | } | ||
| 60 | } else { | ||
| 61 | if (!(opt & OPT_q)) | ||
| 62 | bb_error_msg("%s: not a directory", arg); | ||
| 63 | return EXIT_FAILURE; | ||
| 64 | } | ||
| 65 | } | ||
| 66 | if (!(opt & OPT_q)) | ||
| 67 | bb_perror_msg(arg); | ||
| 68 | return EXIT_FAILURE; | ||
| 69 | } | ||
| 70 | } | ||